The more pesticides are used, the more resistant the insects become so the more pesticides have to be used. It's a vicious circle.

杀虫剂使用得越多，那些昆虫的抵抗力越强，因此就要使用更多的杀虫剂。这是一个恶性循环。

《柯林斯英汉双解大词典》

The pancreas is the organ that helps the body regulate blood sugar. So it's a vicious cycle, Robertson said, and the cause is still unknown.

胰腺是帮助身体调整血糖水平的器官，因此，罗伯逊说，这是一个恶性循环，但糖尿病的病因我们仍不清楚。

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The pancreas is the organ that helps the body regulate blood sugar. So it’s a vicious cycle,Robertson said, and the cause is still unknown.

胰腺是帮助身体调整血糖水平的器官，因此，罗伯逊说，这是一个恶性循环，但糖尿病的病因我们仍不清楚。

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"If we are to defeat this vicious insurgency and by doing so make Britain and the world a safer place, then we must persist with our operations in Afghanistan.

VOA: standard.2009.07.13

In a particularly vicious critique of so-called Smectymnuus, an anonymous Anglican opponent attacked not only these six Presbyterian ministers but attacked Milton as well.

在对所谓的Smectymnuus的特别恶毒批评中，一个匿名的圣公会反对者,不仅对6个长老部长进行了抨击，也抨击了弥尔顿。

耶鲁公开课 - 弥尔顿课程节选

Indeed, so vicious that it is often impossible to simply punish the cheater him or herself.

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But in her trial 10 months later, a jury of 12 men decided no woman could be capable of a crime so vicious.

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So the vicious circle spirals on and the question of why continues to puzzle.

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